Fitment notes: 12V auxiliary battery; located in front trunk; high-performance AGM required for EV electrical system support
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Every control module on the 2024-2026 Porsche Taycan 4S — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
Battery Management System Control Unit (BMS)8.5 hr R&Rsecurity gateway +1.5 hr▸ programming details
📍 Rear underbody, integrated with high-voltage battery pack
🔧 PIWIS III + PPN online
⚠️ Requires battery pack removal; VIN and capacity coding mandatory; high-voltage certification required; Performance Battery Plus standard on 2024+ 4S
Transmission Control Unit / Rear Motor Control (TCU/RMCU)3.2 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Rear motor compartment, mounted to transmission housing
🔧 PIWIS III + PPN online
⚠️ Controls 2-speed transmission and rear motor inverter; high-voltage lockout required; updated motor control software from 2024
Power Electronics Control Module (PECM)2.5 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Front trunk, left side behind service panel
🔧 PIWIS III + PPN online
⚠️ Controls front motor inverter; requires high-voltage system lockout and discharge procedure before removal; updated software architecture from 2024
Climate Control Unit (CCU)2.5 hr R&Rdealer / factory tool +0.5 hr▸ programming details
📍 Dashboard, behind center HVAC vents
🔧 PIWIS III
⚠️ Heat pump system standard; refrigerant recovery required; improved efficiency from 2024
Power Steering Control Unit (EPS)2.2 hr R&Rdealer / factory tool +0.5 hr▸ programming details
📍 Front compartment, steering column base
🔧 PIWIS III
⚠️ Rear-axle steering available on 4S; steering angle sensor calibration required
Porsche InnoDrive Control Unit (PID)2.0 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Dashboard, center behind trim
🔧 PIWIS III + PPN online
⚠️ Optional adaptive cruise with predictive efficiency; integrates navigation and terrain data; available from 2024
⚠️ Fully digital 16.8-inch curved display; mileage programming required; updated UI from 2024
Porsche Connect Control Unit (PCU)1.0 hr R&Rsecurity gateway +0.8 hr▸ programming details
📍 Rear trunk, right side panel
🔧 PIWIS III + PPN online
⚠️ 5G connectivity from 2024; subscription activation required after replacement
Seat Memory Control Unit - Driver (SMD)0.8 hr R&Raftermarket tool +0.2 hr▸ programming details
📍 Driver seat, under seat frame
🔧 PIWIS III or Autel MaxiSys
⚠️ Seat position calibration required; passenger seat has separate module if equipped
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2026 Porsche Taycan 4S Electric and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.